Metallisable azo dyestuffs and process for the production thereof



United 2,856,396 METALLISABLE AZO DYESTUFFS AND PROCESS FOR THE PRODUCTION THEREOF Rudolf Diirig, Basel, Switzerland, assignor to J. R. Geigy A.-G., Basel, Switzerland, a Swiss firm N Drawing. Application May 20, 1957 Serial No. 660,053 Claims priority, application Switzerland June 1, 1956 Y 7 Claims. (Cl. 260-146) The present invention concerns metallisable azo dyestuffs, their complex heavy metal compounds and also the production of these dyestuffs. The invention also concerns the use of these dyestufis for the fast dyeing of natural and synthetic fibres in olive, green, blue to green shades, as well .as the material dyed with the aid of these dyestuffs.

, It has been found that valuable metallisable azo dyestuffs are obtained if diazotised aromatic amines containing in the ortho-position to the primary amino groups substituents which are capable of forming the metal complex or substituents which can be converted into such, are coupled with 2-hydroXy4-methyl-(hydroxy-sulphobenzo)- quinolines of the general Formula I phonic acid and a hydroxyl group in the meta-position to each other.

The diazonium compounds are coupled with the 2- hydroxy-4-methyl-(hydroxy-sulphobenzo)-quinolines according to the present invention which couple in the ortho-position to the isocyclically bound hydroxyl group, in aqueous/ alkaline agents, e. g. in aqueous solution of sodium carbonate or ammonia or in an aqueous suspension of MgO. Often the addition of substances which accelerate the coupling is recommended such as e. g. pyridine bases, tertiary alkanolamines or trialkylarnines.

Azo components according to the general Formula I are 2-hydroxy-4-methyl quinoline derivatives which contain an (m-hydroXy)-sulphobenzo radical bound at an angle to the quinoline ring and which correspond to the general Formulae a or b:

0 a son b am N 2,856,396 Patented Oct. 14, 1958 4 he a N H O Examples of such benzoquinolines according to the present invention are: 2-hydroxy-4-methyl-5.6-(6'-hydroxybenzo)-quinoline-4-sulphonic acid, 2-hydroxy-4- methyl-5.6-(4'hydroxybenzo) -quinoline- 6-sulphonic acid and 2-hydroxy-4-methy1-5.6-( 3 -hydroxybenzo) -quinoline- 5'-sulphonic acid; also 2-hydroxy-4-methyl-7.8-(6-hydroxybenzo)-quinoline-4'-su1phonic acid and 2-hydroxy-4- methyl-7.8-(3'-hydroxybenzo)-quinoline 5 sulphonic acid.

Diazotised monoor poly-valent aromatic amines of the isocyclic and heterocyclic series are used as diazo components, which, in the o-position to the primary amino groups, contain substituents which are capable offorming the metal complex. Also compounds can be used in which these complex forming groups are only formed during the metallising reaction.

Of particular interest however, are amines which already contain one or more arylazo groups and in particular those which correspond to the general Formula II AN=N--BNH (II) In this formula: A represents an aromatic radical of the isocyclic and heterocyclic series which can also contain an arylazo group as substituent, this, in isocyclic compounds, being advantageously in p-position to the azo linkage, B represents a radical from the series of monoand di-nuclear, aromatic-isocyclic, possibly substituted hydrocarbons in which the azo and the primary amino group are in the 1.4- or 1.4-positions to each other and in which, of the neighbouring positions to these two substituents, at least that of the amino group is occupied by a metallisable group or by a substituent which can be converted into such a group.

Of the aminoazo dyestuffs of this general Formula II in which B represents a benzene or naphthalene radical which contains the azo and the primary amino group bound in the 1.4-position to each other, chiefly the pamino monoazo dyestutfs are used. These can contain the substituents usual in azo dyestufis, e. g., halogen, hydroxyl, alkyl, alkoxy, acylamino, nitro, carboxyl, sulphonic acid, carbamide and sulphonic acid amide groups. They are obtained by coupling any diazotised monoamines desired, those for example of the benzene, naphthalene, stilbene, diphenyl or heterocyclic-aromatic series, which e. g. can belong to the thiazole, triazole or tetrazole series and are starting components generally used in polyazo. dyenent or one which can be converted into such.

stuffs, with amino compounds of the benzene and naphthalene series which couple in the p-position to the primary amino group and contain in the o-position to this group a substituent which forms the metal complex.

Examples of starting components corresponding to the symbol A-NH which lead to the p-a-mino monoazo dyestufis of the general Formula II are: l-aminobenzene- 3- or -4-sulphonic acid, l-aminobenzene-2.4- or -2.5-disulphonic acid, 4.6 dimethyl-1-aminobenzene-Z-sulpho-nic acid, 5-amino-2-chlorobenzene-l-sulphonic acid, l-aminobenzene-3- or -4-carboxylic acid, S-amino-Z-hydroxybenzene-l-carboxylic acid, 5-amino-2-hydroxy-3-sulphobenzene-l-carboxylic acid, 5(3'- or 4-aminobenzoyl)- amino-Z-hydroxybenzene-l-carboxylic acid, 4-amino-diphenyl-3-sulphonic acid, 4-nitroor 4-acetylaminoor 4- benzoylamino- 4-amino-stilbene-2.2-disulphonic acid, 1- aminonaphthalene-4-, -5-, 6- or -7-sulphonic acid, 2- aminonaphthalene-3.6- or -5.7- or 48- disulphonic acid, l-aminonaphthalene-3. o-disulphonic acid, 2(4'-amino phenyl)-5-rnethyl-benzthiazole-monoor di-sulphonic acids, 2-(4'-aminophenyl) -naphtho-triazole-5 .7-disulphonic acid, 4-[(4-.5:l".2"-naphtho)-l.2.3triazolyl-(2}l- 4-aminostilbene-2.2'.6"- or -2.2.5-trisulphonic acid and 2(4-aminophenyl)-naphthothiazole-5.7-disulphonic acid.

The usual middle components used in metallisable polyazo dyestuffs can be used as amino compounds oi the benzene and naphthalene series corresponding to the symbol B-'NH which aswell as coupling in the p -posi tion to the primary amino group also contain a metallicable group in the o-position to that group and which, together with the starting components defined above, lead to the p aminomonoazo dyestuffs. in particular those are used which contain a methoxy, ethoxy or carboxyrnethoxy group as metallisable group or as a substituent which can be converted into such a group.

However, also compounds which already contain an arylazo group can be used as starting components according to the symbol A-NH, Here, advantageously again p-amino monoazo dyestuffs are used and in particular those which can be produced from components as described. But also other amino azo compounds can be used as starting components containing azo groups, for example those which are derived from 4-aminobenzene and substitution products thereof.

The amino mono and dis-azo dyestuffs are di azotised in the usual way. Often the indirect method is used with advantage, i. e. the solution of their alkali salts which contains alkali nitrite is poured in the cold into mineral acids.

Valuable dyestuifs are also disazo and trisazo dyestuiis from benzoquinoline sulphonic acids according to the present invention and diazonium derivatives of such compounds of the general Formula II in which the symbol B represents two benzene rings bound by direct linkage or by a bridging member. In these compounds an 0- position to the primary amino group and possibly also to the azo group, is occupied by a 'metallisable substit- Examples of bridging members are carbamide, carbaminyl and ethylene radicals. Such disand trisazo dyestuffs are obtained by tetrazotising diamines of the formula H N-BNH in which B has the meaning given above, and then coupling with one mol of a usual azo compo nent, such as e. g. salicylic acid and, in particular, with a. hydroxynaphthalene sulphonic acid, amino hydroxynaphthalene sulphonic acid or (arylazo)-amino-hydroxynaphthalene sulphonic acid, whereupon the diazo-azo dyestuif is coupled with one mol of a benzoquinoline sulphonic acid according to the present invention to form the complete dyestuff.

As diamines of the formula H N-B-NH as defined above, advantageously 4.4-diarninodiphtenyl-3.3-dicarboxylic acid, 4.4-diamino-3.3-dihydroxydiphenyl as well as 4.4-diamino-3.3-dimeth oxydiphenyl, the homologues and derivatives of the latter substituted at the methyl groups such as e. g. 4.4-diarnino-3.3-di-(carboxy-methoxy)-diphenyl are used. Examples of such dinuclear derivatives having a bridging member which can be used are N (4 amino 3' hydroxybenzoyl) 1.4- phenylendiamine 3 carboxylic acid, 4.4 di (4" amino- 3" hydroxybenzoyl) amino 3.3 dimethoxydiphenyl, 4.4 diamino 2.2 dimethyl 5.5 dimethoxydiphenyl urea and 4.4-diamino-diphenyl urea-3.3'-dicarboxylic acid.

The new polyazo dyestuifs are dark powders which dissolve in the form of their alkali salts, e. g. the lithium, potassium, sodium salts and also in the form of their ammonium salts, in water Withan olive, green, blue to grey colour according to the composition.

The polyazo dyestuffs are very' valuable for the dyeing of cellulose material, in particular, of cotton. The dyestuffs draw onto this materialfrom their aqueous solutions in the warm and in the presence of Glaubers salt and are fixed on the fibres by known methods by treatment with agents giving off copper. The dyeings are fast to wet and light. Such polyazo dyestuifs according to the present invention as have suflicient water solubility in the form of copper complex compounds, can also be used as such for the dyeing of cellulose-containing material. They produce dyeings which have very good fastness to light, good wet fastness properties and some of them have the advantageous property that, on subsequent anti-crease processing of the dye goods, the dyeings undergo no undesirable change in shade nor is the fastness to light noticeably impaired.

Such dysteuifs which contain copper bound in complex linkage are produced by known methods by treatment with agents giving off copper, advantageously in aqueous Solution or suspension at a raised temperature.

The following examples illustrate the invention without limiting it in any way. Where not otherwise stated, in the examples parts are given as parts by weight and the temperatures are in degrees centigrade. The relationship of parts by weight to parts by volume is as that of kilogrammes to litres.

Example 1 o 0 OH 0H3 H O N :N N:

41.7 parts of the aminoazo dyestufi from diazotised 5- *amino-Z-hydroxybenzenal-carboxylic acid and l-amino- Z-rnethOXy-naphthalene-6-sulphonic acid are dissolved at 15 in 1500 parts of water in the presence of a little sodium carbonate. A solution of 7.6 parts of sodium nitrite in 20 parts of water is then added and the whole is poured into 42 parts of 30% hydrochloric acid and parts of water of 15. After stirring for several hours, the pale brown diazo compound has formed whereupon it is cooled with ice to 05 and poured into a soda alkaline solution of 32.3 parts of 2-hydr0xy-4-methyl-5.6- (3'-hydroxy-benzo)-quinoline-5-sulphonic acid in 1000 parts of water containing 10 parts by volume percent of pyridine. The coupling is completed after a short time whereupon the dyestufi is precipitated with a little sodium chloride, filtered off and washed.

In this way, a disazo dyestufi is obtained which is suitable chiefly for the dyeing of cellulose fibres. The wet and light fastness of the blue-grey dyeings thereof can be considerably improved by after treatment with copper salt solutions.

In the following table other dyestuffs are listed which can be obtained in a similar manner. The dyeings thereof on cotton and regenerated cellulose when after coppered also have very good fastness properties.

No. Starting domponent Middle component End component Shade I C O O H O 0 H3 0 H 1 H0 N H, N H, S O=H Greenjsh blue.

C O OH l O CH;

113C OH 1" H0 NH, 2;E;;:NH2 HO N Dm C 0 OH (i) CH; HO

3.- H O NH, NH: Blue-grey.

How

H OOOH (I)QH2OOOH OH 4h HO- NH-oo- NH, NH: Du

HaC OH O 0 OH O CHzC O OH HOGNM NE gm COOH OCHzCOOH CODE ocHmooH SOaH OCH;

Blue grey.

Greenlsh blue.

Blue.

No. Starting component Middle component End component Shade 10 on eon;

Ho-O-Nn-ooONH, NH: D0. H:

--.. CH;@-N/=C- ONH: NH: Do.

s 50,11 ona 11-.-. CHa- '/=OC NH: NH, Greentsh blue.

coon 00,11 12.... HO-QNH: 8NH: Do.

coon 00m 1s HQQNH-GOONH, SOaH Do.

I CH3 Example .2

O( Ju 0 g I N-N-OOH=OH -N=N I I=N 80:11

N S 0 3H 8 0 3H H 0 3S- S 0 311 \N 60.2 parts of 4'-amino-4-(6'-sulphonaphth0-1.2:4.5-tri- 60 off and washed free of pyridine. In thisway a disazo azo1yl-(2) )-stilbene-2.2-disulphonic acid, obtained in the dyestufr is obtained which can be converted in the known known manner, are diazotised and coupled in acetic acid manner with copper sulphate inithe presence'of sodium S01Uti0n W Parts Of Y P acetate, into the copper complex. It dyes cotton and cel- 6-sulphon1c acld. The ammoazo dyestufi so obtalned is 1 1 material i green Shades which have verygood further diazotised by dissolving in 1500 parts of water at 15 in the presence of a little sodium carbonate, adding a solution of 7.6 parts of sodium nitrite in :parts of water and pouring the whole into 42 parts of hydrochloric acid and 80 parts of water at 15. The pale brown diazo compound forms after stirring for some hours. It is cooled with ice to 05 and poured into an ammoni'acal fastness to light. The shade and the fastness to light are only slightly influenced by anti-crease processing.

If in this example, instead of 4-amino-4-(6-sulphonaphtho l.2':4.5 triazolyl (2) stilbene 2.2 disulphonic acid, -4-amino-4-(5-sulphonaphtho-1.2':4.5-

7 triazolyl (2)) stilbene 2.2" 'disulphonic acid or-4- solution of 32.3 parts of 2-hydroxy-4-methyl-5.6-(4'-hyamino 1 methoxybenzene Stilbene droxybenzo)-quinoline-6'-sulphonic acid in 1000 parts of dlsulphifmc and are used and otherwlse P Water which tai 10% by volume f pyridine The cedure 1s followed, then dyestufis are obtained WhICh dye cotton in green shades which have similar good fastness coupling is complete. :in a short time whereupon the dye- 5 properties.

stuff is precipitated with a little sodium chloride, filtered 7 Example 3 dissolved in 2500 parts of water at 80-85. 400 parts of a copper oxide-ammonia solution containing 50 parts of crystallised copper sulphate and 120 parts of concentrated aqueous ammonia, are added and the whole is stirred at this temperature for 4-5 hours. After the addition of a further 50 parts of concentrated ammonia solution the temperature is raised to 9095 for 15-20 hours. The copper complex formed is precipitated with sodium chloride, filtered off and dried. It is a dark powder which dissolves in water with a blue colour and which draws excellently from an aqueous bath onto cotton, linen and regenerated cellulose fibres. The dyeings have very good fastness to light and also the shade and fastness to light are barely influenced by anti-crease processing.

Further dyestuflfs are given in the following table which are obtained in a similar manner by coupling tetrazotised o-dianisidine with the azo components in columns 1 and 2 and then converting the product into the copper complex.

They also dye cellulose material in reddish to greenish blue shades which have very good fastness properties.

No. Component A Tetrazo compound Component B Shade HOaS OH OCH! OCH;; OH

1 NH N H: Blue.

S 0 H H 058 HaC OH H035 OH OCH; OCHa H3O OH HO N D0. 2 NH NH:

B0 5 OH OCH; OCH; H0

3 N r- N D0.

SOaH H058 CHa Y.

O C H; (I) C H; 0 H 4 no- NHz-OGNEB Reddish blue.

-s 0 H H 038- LL C Ha II 00113 con, ER)

5 HO- NH NH; S0311 Blue,

CH3 S 03H i 5.6 (3' hydroxybenzo) quinoline sulphonic acid. properties.

Example 4 000B 00H; OH

HO N=N N=N N=N- N SOsH H3O OH 59.6 parts of the amino disazo dyestutf produced in the The trisazo dyestufl obtained in this way dyes cotton and known manner from tetrazotised benzidine, Z-hydroxyregenerated cellulose in blue grey shades the wet and light benzene-l-carboxylic acid and l-amino-Z-methoxynaphfastness properties of which can be considerably improved thalene-6-sulphonic acid are diazotised as described in by after treatment with copper salt solutions.

Example 1 and coupled, in the presence of pyridine, With A similar dyestufl is obtained which has similar fastness 32.2 parts of 2-hydroxy-4-methyl-5.6-(3'-hydroxybenzo)- properties if 2-hydroxy-4-methyl-7.8-(6'-hydroxybenzo)- quinoline-5'-sulphonic acid in a soda alkaline medium to quinoline-4'-sulphonic acid is used instead of Z-hydroxyfrom the trisazo dyestufi. On completion of the coupling, methyl-5.6-(3'-hydroxybenzo) quinoline 5 sulphonic the trisazo dyestufi is precipitated with a little sodium acid.

Example 6 COOH OCH; OH

HO N=N N= N=N- 03H HOzS- HrC- OH chloride, isolated, pyridine adhering'thereto is removed 46.7 parts of the aminoazo dyestutf from diazotised by washing with diluted salt solution and then it is dried. 5-amino-3-sulpho-2-hydroxybenzene 1 carboxylic acid The trisazo dyestufr" produced in this way dyes cotton and 1-aminonaphthalene-7-sulphonic acid are diazotised and regenerated cellulose from an aqueous bath in blueas described in Example 1 and coupled, in the presence of green shades. When after-treated with copper salt solusodium acetate, with 25.3 parts of l-arnino-Z-methoxytions, the dyeings have excellent wet and light fastness naphthalene-G-sulphonic acid, the medium being acid to properties. litmus paper. The amino disazo dyestuff formed is fur- If 2-hydroxy-4-methyl-5.6-(4 -hydroxybenzo) quinother diazotised in the same manner and coupled, in the line-6'-sulphonic acid is used instead of 2-hydroxy-4- presence of pyridine, with an ammoniacal solution of 32.3

methyl-5.6-(3-hydroxy-benzo) quinoline 5 sulphonic parts of 2-hydroxy-4-methyl-5.6-(3'-hydroxybenzo) -quinacid, then a dyestufi is obtained the olive dyeing on cotton 40 oline-5'-sulphonic acid. The trisazo dyestufi formed dyes of which, when after coppered, has similar good propcotton in blue-green shades and the dyeings are very fast erties.

Example 5 00011 001st, on

E0 N=N N=N CH3 H0 8 HsC OH 38.7 parts of the aminoazo dyestufi from diazotised to wet and light on after treatment with copper salt solu- 5-amino-2-hydroxybenzene-l-carboxylic acid and l-amitions. nonaphth'alene-6-sulphonic acid are diazotised as de- If, instead of 2-hydroxy-4-methyl-5.6- (3-hydroxyscribed in Example 1 and coupled in the presence of benzo)-quinoline-5-sulphonic acid, 2-hydroxy-4-methylsodium acetate with 15.3 parts of 1-amino-2.S-dirnethoxy- 5.6-(4'-hydroxybenzo)-quinoline-6-sulphonic acid or 2- benzene, the medium being acid to litmus paper. The hydroxy-4-methyl-7.8-(6'-hydroxybenzo) quinoline 4'- amino disazo dyestufi formed is further diazotised in the sulphonic acid is used, then dyestuffs are obtained which, same way and coupled, in the presence of pyridine, with an when after coppered, dye cellulose material in grey-green ammoniacal solution of 32.2 parts of 2-hydroxy-4-methylshades which have very good wet and] light fastness Example 7 O CH: O OH; H O

HaCUOH H0 0 24.4 parts of o-dianisidine are tetrazotised in the usual of 2'-'alkoxyl-.4-phenylene, Z-alkoxy-lA-naphthylene Way and poured into a solution of 38.7 parts of the and 3.3-dialkXy-4.4'-diphenylene radicals, aminoazo dyestuff obtained by acid coupling of diazotised X represents a metallisa'ole group ortho to the third azo Z-aminobenzene-l-carboxylic acid and Z-amino-S-naphlinkage, thol-7-sulphonic acid, and 35 parts of sodium carbonate A represents an aromatic radical selected from the group in 1000 parts of water. The addition is made at 05. consisting of radicals of the benzene, naphthalene, After a short time, the dlfiZO-dlSfiZO. dyestuif has comstilbene and Z-phenyl-benzthiazole series, pletely precipitated and no more tetrazonium compound R represents a member selected from the group consisting can be traced. A soda alkaline solution of 32.2 parts of of o carboxyphenyl and o -hydroxycarboxyphenyl 2-hydroXy-4-methyl-5.6-(3'-hydroxybenzo)-quinoline 5'- radicals sulphonic acid is then added and the whole is stirred until 11 represents the numerals 0 and 1, the coupling is complete. The trisazo dyestulf obtained in this manner is precipitated with sodium chloride, isolated and dried. It dyes cotton in dark navy blue shades which, when after coppered, have very good fastness to light. 15

If in this example, the 2-hydroXy-4-methyl-5.6-(3-hydroxybenzo)-quinoline-5'-sulphonic acid is replaced by OCH; OOHS 2-hydroXy-4-methyl-7.8-(6 hydroxybenzo) quinolineand the complex copper compound thereof.

2. A polyazo dyestutf which corresponds to the formula:

4'-sulphonic acid, then a similar dyestulf is obtained which also has very good fastness to light.

Example 8 wherein 2 parts of one of the dyestuffs obtained according to Example 2 or 3 are dissolved in a dyebath in 3000 parts of water and 1 part of sodium carbonate. 100 parts of cotton are entered at 4050, the bath is heated within minutes to 9095, 30 parts of sodium sulphate are added and dyeing is continued for 45 minutes atthe temperature given above. After this time, the dyed goods are rinsed cold in the usual way and dried. The cotton is dyed in 30 this manner in olive green shades which haveygood wet fastness and very good light fastness properties.

If, in the dyeing process, a'dyestuff according to E):- ample 1, 4, 5, 6 or 7 is used, then the dyed cotton is aftertreated, after rinsing, in a fresh bath with 2 parts of copper sulphate and 2 parts of acetic acid for 30 minutes I I at 70. The goods are then rinsed cold and dried. The Q 803E wet and light fastness properties of these dyeings are CH3 considerably increased in this manner.

What I claim is: 40

D represents the radical of a 2-hydroXy-4-methyl-(hydroxysulphobenzo)-quinoline bound in o-position to the hydroxyl group in the isocyclic ring, and

E represents the radical of a hydroxynaphthalene sulphonic acid bound to the azo linkage in o-position to the hydroxyl group,

and the complex copper compound thereof.

3. The polyazo dyestutf which corresponds to the formula:

COOH OCHz (|)H 1. A polyazo dyestuff which corresponds to the formula:

| 4. The cupriferous polyazo dyestuff which corresponds wherein to the formula:

O--Cu O I l N -N -.-orr=oH-O-N;N 1 I=N- SOaH -N A0311 SOaH H0 sl 0311 \N D represents the radical of a 2-hydroxy-4-methyl-(hy- 5. The cupriferous polyazo dyestuff which corresponds droXy-sulphobenzo)-quinoline bound in o-position .to to the formula:

the hydroxyl group in the isocyclic ring, 6. The cupriferous polyazo dyestuif which corresponds B represents a member selected from the group consisting to the formula:

HOsS O-Cu-(I) ()--C 11 l l i S 0 :H H 0 3S '7. The cupriferous polyazo dyestufi' which corresponds to the formula:

H5020 0 o u -o )qu OH; H0aS -S0xH I References Cited in the file of this patent UNITED STATES PATENTS 2,025,991 Kunz et a1. Dec. 31, 1935 FOREIGN PATENTS 1,001,253 France Oct. 24, 1951 302,404 Switzerland Dec. 16, 1954 1,118,439 France Mar. 19, 1956 

1. A POLYAZO DYESTUFF WHICH CORRESPONDS TO THE FORMULA: 